Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
Port Barre's entry into September measures an average high-temperature of a still hot 86.9°F (30.5°C), closely parallel to the preceding month. Throughout September, Port Barre witnesses a nighttime temperature average of 69.6°F (20.9°C).Heat index
The heat index value for September is calculated to be a very hot 102.2°F (39°C). Implement heightened safety measures - risk of heat exhaustion and heat cramps is increased. Prolonged activity may result in heatstroke.In terms of the heat index, values are set with light wind and shade conditions in mind. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'real feel' or 'felt air temperature', unifies temperature and humidity readings to offer a comprehensive feel of warmth. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
Through perspiration, the body has a natural mechanism to eliminate excessive heat via sweat evaporation. Under high air temperature coupled with high humidity (high heat index), the body's perspiration is reduced, intensifying the sensation of heat. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.
Humidity
In Port Barre, the average relative humidity in September is 80%.Rainfall
In September, the rain falls for 13.1 days. Throughout September, 0.75" (19mm) of precipitation is accumulated. Throughout the year, there are 127.3 rainfall days, and 11.65" (296mm) of precipitation is accumulated.Snowfall
February through November are months without snowfall.Daylight
In September, the average length of the day is 12h and 20min.On the first day of September, sunrise is at 6:44 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 7:01 am and sunset at 6:53 pm CDT.
Sunshine
In Port Barre, the average sunshine in September is 9.4h.UV index
The average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: A typical high UV index of 6 in September suggests the following recommendations:
Guard against overexposure. Protection from sun-induced harm is essential. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in Port Barre in September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
How many hours of daylight does Port Barre have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Port Barre have in September?
How high is the UV index in September?
Average temperature in September
Port Barre, LA
- Average high temperature in September: 86.9°F
The warmest month (with the highest average high temperature) is July (90.3°F).
The month with the lowest average high temperature is January (57.7°F).
- Average low temperature in September: 69.6°F
The month with the highest average low temperature is August (73.8°F).
The coldest month (with the lowest average low temperature) is January (42.4°F).
Average pressure in September
Port Barre, LA
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in September
Port Barre, LA
- Average wind speed in September: 5.1mph
The windiest month (with the highest average wind speed) is February (7.9mph).
The calmest month (with the lowest average wind speed) is July (5mph).
Average humidity in September
Port Barre, LA
- Average humidity in September: 80%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Port Barre, LA
- Average rainfall in September: 0.75"
The wettest months (with the highest rainfall) are July and August (1.57").
The driest months (with the least rainfall) are February and March (0.63").
Average rainfall days in September
Port Barre, LA
- Average rainfall days in September: 13.1 days
The month with the highest number of rainy days is August (15.9 days).
The month with the least rainy days is November (6.6 days).
Average snowfall in September
Port Barre, LA
- Average snowfall in September: 0"
The months with the highest snowfall are January and December (0.04").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Port Barre, LA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Port Barre, LA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).
Average sunshine days in September
Port Barre, LA
- Average sunshine days in September: 13.8 days
The month with the most sunshine days is November (21.9 days).
The month with the least sunshine days is August (10.7 days).
Average UV index in September
Port Barre, LA
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in September
Port Barre, LA
- Average cloud cover in September: 34
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is October (Cloud cover 28).
Average visibility in September
Port Barre, LA
- Average visibility in September: 5mi
The months with the highest visibility are January, February, October, November and December (6mi).
The months with the lowest visibility are March, April, May, June, July, August and September (5mi).
Port Barre, Louisiana, USA
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